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Detection of and compensation for stray capacitance in capacitive touch sensors
Detection of and compensation for stray capacitance in capacitive touch sensors
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机译:电容式触摸传感器中杂散电容的检测和补偿
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摘要
The present invention provides systems and methods for detecting stray capacitance in capacitive touch sensors. The existence of stray capacitance can lead to errors in touch detection and touch position determination. Such errors can be avoided or corrected when the stray capacitance is detected. Detecting stray capacitance includes analyzing signals for features characteristic of stray capacitance noise events. Such features can include spatial features such as the location of a test touch position determined from signals caused by stray capacitance, as well as temporal features such as the rate of change of the detected signals.
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